Sometimes it’s hard to see things that are right in front of us. That includes some truly remarkable things that we’ve come to consider ordinary.Take wastewater treatment. Pretend for a moment that you don’t know anything about the business — that you’re basically Joe or Jane Citizen. Stand at the inlet to your treatment plant and watch the water flow.You might wonder: How in the world can they make anything useful out of this filthy, smelly water? And yet, what comes out of your treatment plant? First, clean water — clean enough to protect your receiving stream, maybe clean enough
